Substation-sender



G. H. HEYDT.

SUBSTATION SENDER. APPLICATION FILED DEC.1,1916.

1,355,971. Patented-oat. 19,1920

hivenfor:

George H. Heydfi by m a ANIM- systems.

1 UNITED STATES-- PATENT OFFICE.

GEORGE H. HEYDT, OF NEW YORK, N. Y., ASSIGN OR TO WESTERN ELECTRIC COMPANY INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

SUBSTATION-SENDER.

Application filed December 1, 1916.. Serial No. 134,341.

To all whom it may concern: I

Be it known that I, GEORGE H. HEYDT, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Substation-Senders, of wh1ch the following is a full, clear, concise, and exact description.

This invention relates to substation senders -for use in automotic It is the object of-this invention to provide a sender of simple construction which may be conveniently mounted in the base of'a telephone deskstand. I p

' A feature of this invention is the form of the dial plate and its of the desk stand.

An additional feature is the'horizontal mounting :of the shaft carrying the impulse cam, thereby producing a structure which requires comparatively little space in a vertical direction.

It is thought that the invention will best be understood from the following detailed description, reference being had to the accompanying drawings:

In the drawings, Figure l is a perspective view showing the location of a movable member in the base of the telephone desk stand; Fig. 2 is a perspective view showing the mechanism by which circuit interruptions are produced; Fig. 3 is a perspective view showing an alternative scheme for providing a ratchet connection between the toothed rack and the shaft carrying the impulse cam and governor; and Fig. 4 is a' sectional view on the line 5-5 of Fig. 1, and shows the relation of the guide members to the slot in the cap portion of the desk stand base.

In Fig. 1 is shown the base of a desk stand of a standard type. In the cap portion 1 is cut a slot which follows the arc of a circle concentric with the instrument supporting column 2. A finger-hold plate 3 is operable through this slot, a stop 4 being turned back from the cap portion 1 to arrest forward motion of a finger engaging a finger hold. A substantially semi-circularopening 40 is also cut in the cap portion for a purpose to be described.

Guide members 6 and 7 are attached to the edges of the slot in any suitable manner, their relation to the cap and slot being best telephone exchange position in the base seen in' Fig. 4. The finger-hold plate 3 is slidably mounted in these guides, and carries underneath it a number plate 8. To the bottom of the number plate 8 is attached a strip of curved tooth rack-9, anti-friction rollers 10 being mounted in the guide members 6 and 7 to allow free sliding motion of the .rack and number plate. A lug 11,

integral with the guide member 7 is turned back to lie under the opening 10 in the cap portion and in the plane of finger-hold plate 3. The finger holds 12 are U-shaped, the arrangement being such that when' the finger engaging any one of the holds. 12 is arrested by the stop 4., it will be caused to slide out over lug 11 when the open por-. tion of. the :finger hold registers with the opening 40 in the cap.

- The impulse producing mechanism shown in Fig. 2 will first be described. A rotatable shaft l3is mounted in a bracket 14, and

carries a gear wheel 15 arranged to be engaged by rack 9. An arm 16 is secured to the periphery of gear wheel 15, and pivoted to an extension of arm 16 is a pawl 17, which is arranged to engage the teeth of a ratchet wheel 18. The ratchet wheel 18 is fixedly secured to shaft 13, but the wheel 15 is rotatablymounted thereon. An impulse cam 19 and a governor 35 of any well-known type are fixedly secured to the shaft 13. An extension 20 of bracket 14 carries contact springs 21 and 22, arranged to be operated upon actuation of impulse cam 19.

The operation of this structure is as fol- Specification of I.etters Patent. Patented Oct. 19, 1920.

lows: Upon forward motion of the tooth rack, the wheel 15 will be rotated, but will not cause the shaft 13 to rotate, since pawl 17 will ride over the teeth of ratchet wheel 18, which is prevented from rotating in a forward direction by a catch pawl 23. When the finger is arrested by stopjl it will slide out overlug 11 and the number plate and rack will be, restored to their normal position under the tension of a spring 24, one end of which is attached to rack 9 by means of. a pin 25, and the other end of which is attached to the base of the desk stand by. means of a pin 26. Upon return motion of the rack 9, gear wheel 15 will be rupting device controlled by said plate. 7 r

2. In combination with a telephone desk motion is controlled by the scribed, wheel a stand, a 7 base by the operation of cam 19 on impulse drawlng, against the tension of a spring 29, forward motion of wheel 27 being prevented by a catchpawl 30. When the numberfplat'e'is released and is restored under the tension of spring 24:, as. previously dewith the teeth of rack 9 by the action of spring 29, causlng the rotation of shaft 13 and the production of circuit interruptions, as previously described. V

VVhatis claimed is:

1. In combination with a telephone desk including a cap portion,

7 having a curved slot in said cap portion,

guide members secured to the underside of said cap portion, a number plate shdably mountedin said gu1des, and a circuit interstand, a base including a cap portion having I a slot curved concentrically with said base,

' guide members secured to the underside of said cap portion, mounted in said guide, a horizontally mounted shaft carrying means to operate said shaft under the con- 'trol of said number plate.

3. In combination with a telephone desk 27 is thrown into engagement stand, a base including a number a number plate slidably.

an impulse cam, and.

stand, a base including a cap portion having a curved slot therein, guide members secured to the underside of said cap portion, a number plate slidablymountedin said guides, a rotatable shaft carrying fixedly secured theretoan impulse cam and a ratchet wheel,

and means including said ratchet wheel to cause rotation of said shaft upon motion of said number plate in one direction only.

- 4. In combination with a telephone desk stand, a base including a cap portion having a curved slot therein, guide members secured r 55 tothe underside-of said cap portion, a number plateslidably' mounted in'said guides, a rotatable shaft carrying fixedly secured a gear wheel rotatably mounted on said shaft, a toothed rack carried onthe underside of said number-plate and arranged for engagement with 'said gear between said gear. wheel and said ratchet wheel whereby said-shaft will be rotated,

upon motion of said'gear wheel in one direction only. f

In combination with a telephone desk cap portion having thereto an impulse cam anda ratchet wheel, 7

wheel, and a connection a curved slot therein, guide members secured to the underside of said cap portion,,a number plate slidably mounted in said guides, a

curved toothed member carried by said number plate,a,rotatable shaft, an impulse cam and a toothed wheel mounted on said shaft, 7;

said toothed wheel being arranged for: en-

gagement with said toothed member, and a" connection between thetoothed wheel and V shaft whereby, said shaft will be rotated upon motion of said toothed member inone V direction only. r

In witness whereof I hereuntosubscrlbe my name this 28th day'of l Iovember, A D. 1:916. V

GEORGE H. HEYD T. 

